Calculating device



a citizen of the United States, residin Patented Dec. 23, 1924.

UNITED STATES PATE-NT o FFIC-E.

momma s. BICKNELL, or NITRO, Wris'r vmGmrii, AssIGNon To LIOT Bronnen,

or NEWToN HIGHLANDS, massacnnsn'r'rs 4oianctrnarlivcf nEvreE. y

application med april 4, 1922. serial infaiaaso.

To all whom t may concern.'

Be it known that I, RICHARD S. BICKNELL,

Nitro, in the county of Putnam and tate of West Virginia, have invented certain new yand useful Improvements in Calculating lowing to be a full, clear, and exact descrin-v tion of the invention, such aswi'll enab e other skilled in the art to which 'it appentains to make and use the same.

The invention to be hereinafter described relates to calculating devices, and more parr ticularly to devices for calculating the of wool per pound after the grease has een removed therefrom with consequent shrinke- The price of the grease containing w ool and the percentage of shrinkage being known, the problem is to determine the price of a pound of clean wool. This price can be computed, but it is a time consuming operation with liability of error in the calcula' tion. Y

Also, the prices per pound of the. rease containing wool varies, and the shri\kage varies,'so that inthe absence of a calculating device, frequent computations would Vneed to be made.

The aim and purpose of the present invention, therefore, is to provide a simple,`

cheap calculating device whereby the clean price of wool per pound'for varying grease prices and shrinkage per pound, may be quickly, easily and accurately ascertained.

The character of the invention may be best understood by reference to the following description of an illustrated -embodi` ment thereof vshown in the accompanying drawing, wherein:

Fig. 1 is a view of one side of a calculatin device embodying the invention; ig. 2 is a view of the opposite side of the device; y

Fig. 3 is a viewof one side of the slideI removed frein its holder; and l Fig. 4 is a view of the oposite side of the slide shown in' Fig. 3.

Referring to the drawing, the -illustrated embodiment ofthe invention shown therein, comprises a holder desirably in the form of an envelope or wrap er 1 which may be made of celluloid or ot er suitable material.

of longitudinal adjustment with respect to Devices; and I do hereby declare the fol-t l The holder has an elongated aperture i A slide of carboard, celluloid or other suitable material, may have an area substan- "3 the holder. .At opposite ends of the holder are thumb notches 5 exposing end portions of the slide to facilitate grasping and sliding ofthe slide relatively to the holder. Y

(Fig. 2) in the reverse side thereof, and on a margin of the holder extending along one side of said aperture is a scale 9 having graduations marked with numbers, arranged in arithmetical progression and re resenting knotvn values, such, for exampiei, as the known grease prices of wool per pound. l

The obverse side of the holder has an ,I

aperture 11 therein. On a margin of the holder adjacent this aperture is a `scale 13 having graduations marked with numbers forming a continuation of the scale 9. On a margin of the holder at the opposite side of the aperture 11 is ascale 15 having graduations marked vwith numbers forming a continuation of the scale 13.

On the reverse side of the slide 3 referred to, is a scale 17 (Fig. 4).marked with numbers arranged in arithmetical progression and representing percentage values, such, for example, as percentages of shrinkage of wool per pound. On the obverse side of the slide is a scale 19 (Fig. 3) similar to the scale 17.

Thevscale 17 vis so located on the slide, that it may be visualized through the aperture 7 in the reverse side of the holder, and the percentage numbers may be read inconneetion with the grease price'numbers on the scale 9. The scale 19 is so disposed on the slide, that it may be visualized through the aperture 11, and the percenta e numbers thereof may be read inconnection with either ofthe grease price scales 13 and 15.

The slide has a scale 21 on the reverse 3 side thereof having graduations marked and lsaid nun'iliers may be read in connection with an index Qn on the holder adjacent the aperture 23.

Also. on the reverse side ot the slide is a scale QT having graduations marked with numbers representing clean prices ot wool per pound. said numbers heing visnaliaed through an aperture 29 in the reverse side of theu holder. and the numbers ot the scale 27 may be read in connection with an index Ill on the reverse side ot' the holder adjacent the aperture Q9.

n the obverse side of the slide is a scale 3:3 (Fig. 3) having graduations marked with numbers representing clean prices ot wool per pound. These numbers may be visualized through an aperture 35 in the obverse side of the holder. and said numbers maj he read in connection with an index 37 on the holder adjacent said aperture.

On the obverse side of the slide is another sfale 39 having graduations marked with numbers representingr cleanI prices of wool per pound. These numbers may be visualized through an aperture 41. in the obverse side of the holder, and said numbers may be read in connection with an index'43 on the holder adjacent said aperture.

(n the obverse side of the slide is another scale 45 having graduations marked with numbers representing clean prices of wool per pound. These numbers may be visualized through an aperture 47 in the obverse side ot' the holder. and may be read in connection with an index 4S) on the holder adjacent said aperture.

On the obverse side of the slide is still another scale 51 having graduations marked witlrnumbers representing clean prices of wool per pound. These numbers may be J'visualized through an aperture 53 in the reverse side of the holder, and said numbers ma)v be read in connection with an index 55 on the ,holder adjacent said aperture.

It' the known grease price ot' the wool appears on the reverse side of the holder. the slide is adjusted to bring the number representing the knownl percentage of shrinkage opposite the grease price number, and then a number on one ot the clean price scales 21 and 27 will be visible through one ot the apertures Q3 and Q9 in registration with one ot' the indexes 25 and 31. and this will indicate the clean price ol the wool per pound.

It the known grease price appears in the scale 13 on the obverse side of the holder, and the slide is adjusted to bring the known shrinkage percentage in registration with said grease price, the clean price will be visible through one of the apertures 35 and 4l in registration with one of the indexes 37 and 43. and this will indicate the clean price of the wool per pound.

It the known grease price of the Wool is in the scale on the obverse side. of the holder, the lclean 'price will be visible through one of the apertures 47 and 53 in registration with one of the indexes 49 and and this will indicate the clean price ot' the wool per pound.

lt' desired. the numbers of the scales 13, :1:5 and S9 which are read together and appear at the lett of the elongated aperture 11 on the obverse side ot the holder, may be printed in black: whereas. the scales 15, 45 and 51 which are read together and appear at the right hand side of said aperture, may be printed in red, therebv further to distinguish between the left and right hand scales.

li: :h of the grease price scales is marked Grease price, the apertures through the shrinkage scales are visible, are marked Shrinkage, and the apertures through which the clean price scales are visible, are marked Clean price.

The clean prices are determined by compatat-ion. For example, if the grease price per pound ot' wool is 40129, and its shrinkage after beingy cleaned is then 158 of a pound of clean wool costs 40, and one pound of clean wool would cost 5045, the latter amount being determined by dividing 40 by 80. and multiplying the result by 100.

This computation may be determined b v the following equation or formula In using the calculating device, assuming the cost of the grease wool to be 4099, and its shrinkage when cleaned to be 20%, to determine the cost of a pound of clean wool.y the slide is adjusted longitudinally in its holder until 220% on the scale 19 is in registration with 40 on the scale 15. Then 50 in scale will be visible through the aperture 47 and in registration with the index 49, thereby indicating that the price of a pound of clean wool is 50.

Referring to Fig. 1, the slide has been adjusted for the computation in which the grease price of a pound of wool is and the shrinkage is 64%. Therefore, 64% in scale 19 is in registration with 60 in scale 15. and the clean price visible through the aperture 47 in registration with the index 49. is $1.66. thereby indicating that the price of a clean pound of wool is $1.66.

Ina

of wool for various known grease Yprices perk pound of wool and variousshrinkages.

Another use which may be made of this calculating device is to Aplace the index against the assumed clean price of thc wool. For example, assume that by examination 'of a'given sample of wool it is the judgment of the observer that its clean price would be 95 cents per pound. Then, by looking at the shrinkage scale the observer would know what the grease price would be within various limits of shrinkage per cent. Thus, considering that the shrinkage would be between 60% and 65%, it would be apparent that the grease price would bebetween 33 and 38 cents per pound. This use of the device is alike of value to the wool buyer and to the wool seller, the wool buyer in fixing the price he can offer for the wool, and the seller in estimating the market price of the lwool he has for sale.

The word shrinkage as used herein is the per cent of diminution of Weight of the wool due to the cleaning process. This is the terminology used in the American market. In the British, Australian, New Zealand and other foreign markets the term shrinkage is not used, but the word yield is used, and the scale that would be used in the device in such places would, instead of having the per cent of shrinkage printed thereon, havethe per cent of yield printed' thereon, which would be the diff'ference between the percentage furnished fand'floo.:

Thus,instead of 10, 90; instead of 'It will that the invention is not limited-I'tol the yspecific embodiment shown, and that various deviations may be made therefrom without departing from the spirit and scope of the appended claims.

What lis claimed is A l. A calculating device having, in combination, two relatively sliding members having adjacent computing scales, one of the members being provided with two nonaligned result scales and the ,other member having two indexes whereby the result of the computation may be read against either one of the indexes. o

2. A calculating device having, in combination, a. holder having an elongated opening and two non-aligned apertures, the holder being provided `with a scale adjacent the margin of the elongated opening and an index adjacent each ofthe apertures, and a slide having a computing scale adapted. to

be set selectively with respect to the holder scale, and two scales upon one of which the result 'may be read adjacent one of the indexes on the holder.

' 3. A calculating device having, in combination, a holder provided with an elongated `central opening, number scales adjacent the margins of the opening, one of the scales i being a continuation of the othe slide having va computing scale com' both of the holder scales, and a painf'o y dicating scales for each of the. holderfscales,

the holder being provided-with four indexes, one for each. result indicating scale of the slide, whereby the result is indicated against one of the indexes regardless of the position of the slide.

4. A calculating device having, in combination, a holder having an elongated opening with a logarithmic scale adjacent the margin thereof and two nonaligned sight apertures, a slide having three logarithmic scales, one of which is visible through/the central openin of the holder and the other two being visi le through the apertures in the holder, the holder being provided with indexes on the margins of the sight apertures, the slide being adapted to be set relatively to the holder scale for a mathematical computation, the result of which may be read against one of the indexes. A

RICHARD S. BIGKNELL. 

